*{
    margin:0;
    padding: 0;
}
.exter{
    width: 400px;
    height: 400px;
    margin: 0 auto;
    padding-top: 120px;
}

.fram{
    padding:10px;
    background-color: rgba(255,255,255,0.4);
    border-radius: 10%;
}

 .login-form-button {
    width: 380px;
  }
.exter-son{
    width: 400px;
    height: 50px;
}
.exter-son h2{
    margin-top: 5px;
    text-align: center;
}

#back{
    background-image: url("back.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    height:720px;
}
